Plastic composition.



men-r rinses, or Innmnsroms, INDIANA, hssrenon or ONE-TENTH so an KEAY, OF INDIANAPOLIS, IlQDIAEi'.

PLASTIG COMPOSITIOE'J'.

No Drawing.

To all "whom 2'25 may concern.

Be it known that I, HARRY H. PIERCE, a

citizen of the United States, residing at indianapolis', in the county of ldarion and State of Indiana have invented new and useful lmprot'enientsin Plastic Compositions, of which the following is a speciiication.

This invention relates to Wall plaster, or the like and its object is to provide plastic compositions for use in the manufacture of tiles, etc, or as a composition oi this character which is extiumely light in Weight,

which iselustic and Will not crack or break under all ordinary conditions of service, which is a perfect non-conductor of sound, w ch may be Washed and scrubbed Without injury and which is hard and tough and capable of being cut and sawed, or penetrated by nails, Without liability of cracking or disintegrating.

A further object of the invention is to provide a composition adapted for use as a Wall plaster which may be easily and corn veniently spread and applied which willv firmly adhere to the laths and wall or other surface, and which embodies the other desirable advantages above set forth.

In carrying my invention. into practice, for the production ofa wall, I employ a tiller consisting of coke breeze or coke dust, combined with a suitable cementitious binder and other materials if desired. Coke dust,

or, as it is sometimes called, coke breeze, I

have found to be superior in every respect to sand and other fillers, as it is much lighter in weight, While at the same time combines more thoroughly with the binding substances used, and produces a plastic material which is tougher and harder, and much more elastic, than plastic materials employing sand or equivalent material as a base or filler.

In practice, I may employ plaster of Paris, lime, Portland or other cement or stucco as a binding substance, according to the special service for which the plaster is to be made. In making a mortar for plastering wood, metal or any other surface except tile, brick or like material, I preferably employ the'following composition, subject to such changes in proportions as is especially suitable for the particular surface to be plastered. L.

Colic dust, ground very-fine, 56 parts;

Specification of Letters Iatent.

Application filed January 30, 3.917.

Patented @ct.

Serial No. 145,503.

Stucco, 38 pa combined with quaniity of cattle hair to hold JG combined when pushed through cracks crevices, and a small quantity oi a suitable retarder to govern the time period setting; of the mass.

In Where the material is to b on brick, tile or like Wall surfaces, th is'onlittcd and in lieu thereof about cares, more or less. of coke dust is added.

In preparing the composition, th rials are intermittently mixed in nry co" dition, stored in. bags or other receptacles for delivery when wanted, and wh n it is We desired to enn'iloy the COl11OSll .lf) itable quantity thereof is combined w and reduced to a plastic conditu to be applied to the surit'ace by 1* L115 0; plastering trowel. The plaster f plied to the usual thickness on a face Weighs approximately c6 lbs. cubic foot, While other plaster; e sand as a filler Weigh in the 3 of 100. lbs. to a cubic foot, a :nzuei' cl of weight being thereby eii'ected. Y plaster is dry it is a perfect nou-conduc';o of sound capable of being" Washed scrubbed Without injury, and is at the sam time elastic and may vibrate and bend to the structure element to which it a p plied with out breaking or cracking. It may be sauce or cut in a cleanly manner at any time and is tough enouqh to enable nails to be driven through it Without cracking, splitting or disintegrating.

The binding material eniploved. for instance lime, is invariably used in hydrated condition, thus avoiding any change 111 the proportions of the elements when combined 9-5 .and n'iined with Water for use, Well as avoiding the generation of heat, whereby the composition is weakened and its binder powers materially impaired. A filler consisting of coke dust may accordingly be otiicintly and economically used in the groduc on of a plaster Whiel'i is superior e ery respect to plasters of the kind employing sand and like fillers, or which employ a binding, such lime, in an unslah'ed state.

In preparing a plastic composition for use in the production of tiles, such as hol low partition tiles, road ct er objects,

z cc of plaster or cement. it (lust in this composition gives the grit to produce a hard firm tile article, and Which is exceedingly zong and. durable and light in weight.

is may be driven through such a tile it cracking or breaking the same, and, coke dust has a tendency to grip the ml hold it firmly, the necessity of inwoorlen blocks in the plaster Wall hin which to drive the nails is avoided. (5 a lire. bond of this character olcl and maintain the tiles in position, where: under like conditions Wooden supporti blocks are liableto be burned out,

rims creaking the bond and allowing the renewal wall to fall Where sand is used as a filler, the composition is liable to crumble, break :20 or crack under strain, While on the contrary the coke breeze holds the particles firmly and intermittently combined and resists fracture and disintegration to a high degree. 25

I claim A plastic composition including dry slaked lime, coke dust, ground clay andca stucco.

In testimony whereof I affix my signature 30 in presence of two Witnesses.

HARRY H. Pianos.

Witnesses W. D. LANE, JNo. KEAY. 

